Machine



4 Sheets-Sheet 1.

(No Model.)

J. KINZER.

SAND MOLDING MAGHINE. No. 300,482. Patented June 17, 1884, 57

\NITNESSES: INVENRFOR.

. man?! ATTORNEY.

(No Model.) 4 Sheets-Sheet 2.

J. KINZER.

SAND MOLDING MAUHINE. No. 300,482. Patented June 17, 1884.

WITNESSES: INVENTOR.

BY QKWYL/mI/i N. PCI'ERS. PMluUiIwgr-vpbcr. Washington. a c.

(No Model.) 4 Sheets-Sheet 3. J. KINZER.

SAND MOLDING MACHINE.

No. 300,482. Patented June 17, 1884.

INV ENTOR MM BYZ (IYYL ATTOR N N. PETERS. Pholo'Liihognphnr. wanm. o. c.

4 Sheets-Sheet 4.

(No Model.)

J. KINZER.

SAND MOLDING MACHINE. No. 300,482. Patented June 17, 1884.

ATTOR NE NITED STATES PATENT Uranus.

JACOB KINZER, OF PITTSBURG, PENNSYLVANIA.

SAND-MOLDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 300,482, dated June 17, 1884.

Application filed March 21, 1884.

To all whom it may concern;

Be it known that I, Jilcon Kinznn, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered a certain new and useful Improvement in Sand- Molding lllachines, of which improvementthe following is a specification.

In the accompanying drawings,which make part of this specification, Figure 1 is a view in end elevation of my improved machine for forming the cope and cores for a sand mold. Fig. 2 isa top plan view of the same. Fig. 3 is a sectional elevation showing the cope and core completed. Fig. 4 is a similar view showing the cores withdrawn from the coreboxes. Fig. 5 is a sectional elevation showing the machinearranged for forming the matrices in the drag, the patterns being withdrawn from the mold. Fig. 6 shows the two parts ofcompletcd mold placed together. Figs. 7 and S are detail views of one end of the cross-head and one end of the pivotal rod, respectively. Fig. 9 is an enlarged detail view of the stop-plate. Fig. 10 is a detail view showing the cross-head in perspective. Fig. 11 is a detail view showing part of the frame in perspective. Fig. 12 is asectional view of the frame on the line :0 a, Fig. 11.

Herctofore in making pipe-balls it has bee customaryto form a series or nest of matrices in the drag, each of said matrices being provided with points for centering and supporting the cores, which were formed-separately and independently of each other, one at a time, and also required baking before they were placed in the matrices. This operation of forming and baking the cores consumed considerable time, and as also the final ad 46 justment of these cores in the matrices; and,

further, a great many cores are broken during the numerous manipulations to which they are subjected from the time they are formed until they are placed in the mold; and it has also been necessary to hold the cores in place by means of some superimposed weight, and for this purpose a roughly-formed cope has been used.

My invention relates to a machine for forming a nest of matrices in the drag, and a corresponding nest of cores in the cope portion of (No model.)

the mold, thereby avoiding the necessity of separately and independently adjusting each core and weighting it in position; and my invention consists in the construction and combination of parts, all as more fully hereinafter described and claimed.

Upon the bed 1 of a suitable press is secured the frame 2, of a size approximately that of the flask in which the mold is to be formed. On the top of this frame is secured the top plate, 3, provided at two of its edges with holes for the dowel-pins t of the flask, thus insuring the proper location and retention of the flask during the molding operation. In the plate 3 are formed a series of holes or openings in which are secured by riveting or otherwise the ends of the depending coreboxes 5. The ends of the frame 2 are slotted, and into these slots are placed the guide- .plates '7, provided with the vertical slot 6.

(See Fig. l.) The lower part of the guideplate fits into recesses in the ends of the bed 1. \Vithin the slots 6 are placed the ends of the cross-head 8, and onto the ends of this cross-head are attached the plates 9, whose edges extend beyond the sides of the slots and rest against the outer sides of the guide-plates 7, a central projection or rib, 10, of the plate extending into the slots and bearing against the ends of the cross-head. To the cross-head are pivoted the lower ends of the links 11, the upper ends of the links being pivoted to the hand-levers 12. The rear ends of these levers are secured to the pivotal rod 13 in the following manner: (See Fig. 8.1) The rod 13 is mounted in suitable bearings, 14, on the rear side of the frame 2, and outside of these bearings are formed on the rod 13 the arms 15, the ends of the rod projecting slightly beyond the arms 15, as shown at 16, Fig. 8. On the projection 16 is placed the end of the lever 12, and said lever and the arm 15 are secured together by the screw 17 a little forward of the end of the lever.

To the cross-head 8 within the frameZ is secured the plate 19, to which, in line with the core-boxes 5, are attached the core-lifters 20, the upper ends of said core-lifters being of a size to fit snugly within the lower ends of the core-boxes. Near the edges of the plate 19 are secured the rods 21,wl1ich pass up through IOD holes in the top plate, 3, and serve, when the cross-head is raised, to lift the part of the flask resting on the top plate.

To the plate 7, at one side of the slot 6, is attached the strip 22, provided at its inner side with the flange 23, the upper end of said flange being expanded, as shown, to form a shoulder or stop, 24. On the lower end of the strip 22 is adjustably secured the stop 25, the inner edge of said stop resting against the flange 23, as shown in Fig. 9.

To the hand-lever 12 is pivoted the bellcrank lever 26, one end of said bell-crank lever being made longer than the other, and arranged in convenient proximity to the handle of the lever 12. The short and vertical arm of the bell-crank lever is arranged in line with the stops 24 and 25.

To form the matrices in the drag a plate, 27, to which are attached patterns 28, is substituted for the plate 19, and in lieu of the top plate, 3, to which are attached the core-boxes 5, a plate, 29, is attached to the top of the frame 2, said plate being provided with perforations having a diameter slightly larger than the diameter of the patterns 28. The plate 29 is also provided with a suitable pin for guiding the flask into position on the plate 29. v

The operation of my machine is as follows: In forming the cope and cores a snap-flask is adjusted to the top plate, 3,a11d the cross-head is lowered until the short armof the bell-crank lever rests upon the stops 25, which should be so adjusted that when the short arm of the bellcrank lever rests upon them the upper ends of the core-lifters 20 will be within the lower contracted portions of the core-boxes, as shown in Fig. 3. Sand is packed in the core-boxes 5, venting core-rods 30 being used, which consist of a nail-like bar having teeth or serrations on two of its sides, and longitudinal grooves on the other sides, and small wires having their lower free ends arranged in said grooves, theupper ends of the wires being united. Then the flask is filled with sand, which 'is packed by any suitable meansas, for example, the plunger of a press. The cores are then loosened in their molds by blows of a hammer or mallet on the projection 32 of the plate 3, said projection being formed on the plate for that purpose. The handles of the levers 12 are then raised, thereby raising the plate 19 and the core-lifters and rods 21. These core-lifters and rods act equally and simultaneously on the flask and the ends of the cores, thereby avoiding all liability of detaching or break ing the cores from the body of the mold. On the top plate, 3, are secured the runner-patterns 33 in convenient proximity to several cores.

' In forming the drag portion of the mold the plate 27, carrying the pattern 28, is substituted for the plate 19, and the topplate, 29, is substituted for the plate 3; or, as I prefer, another machine similar in all respects, with the exception of plates, as above stated, is used for forming the drag portions of the mold. In such a machine the levers 12 are raised until the short arm of the bell-crank rests upon the upper stop, 24, and the patterns 28 project the desired distance above the top plate, 29. An

ordinary half-flask is then placed in position,

the guide-pins projecting into the notches provided therefor on the sides of flask. Sand is then placed in the flask and packed by any suitable means. The handle end of the bellcrank levers is then raised until their short ends are freed from the stops 24 and the levers 12 are depressed,thereby drawing the patterns from the molds. The, drag is then removed and turned over into the position shown in Fig. 6. The previously-formed cope is then placed on the drag, it being guided into positionby its dowel-pins fitting into notches in the sides of the drag. The flask in which the cope is formed is then opened and removed,

from the cope, leaving the latter in position on the drag, thereby forming a completed mold, ready to be filled. On the top plate, 29, are secured runner-patterns which are the complements of those on the top plates.

By making the lower stop, 25, adjustable I am enabled touse longer patterns and coreboxes, as will be readily understood.

On the under side of the snap-flask are the plates 34', against which the rods 21 bear in raising the flask.

It will be noticed that as both levers 12 are rigidly secured to the pivotal bar 13, it is impossible to raise one of said levers faster than the other, which would cause an unequal movement of the parts, thereby endangering the cores or the matrices of the mold.

While I have shown and described with some particularity the venting core-bar, I do not herein claim the same, as that will form the subject-matter of another application of even date herewith.

I claim herein as my invention 1. In a molding-machine, the frame 2, in

combination with the top plate having the core-boxes secured thereto, the core-lifters 20, and mechanism for raising and lowering said core-lifters, substantially as set forth.

2. In a molding-machine, the frame 2, in combination. with the top plate having the core-boxes secured thereto, the core-lifters 20, flask-raising rods 21, and mechanism for raising and lowering the core lifters and rods,- sub stantially as set forth. 7

3. In a molding-machine, the frame 2, in combination with the top plate having coreboxes secured thereto,the core-lifters 20, flaskraising rods 21, the cross-head 8, carrying the lifters and rods, and mechanism for raising and lowering the cross-head and holding the same in such raised and lowered positions, substantially as set forth.

4. In a molding-machine, the frame 2,having slotted sides, in combination with the crossand rigidly secured at one end to the pivotal rod 13, substantially as and for the purpose set forth.

5. In a molding-machine,thefraine2,having slotted sides, in combination with the crosshead 8, having its ends located in said slots, the cap-plates 9, secured to the ends of the cross-h ead, the links 11, and levers 12, rigidly secured to the pivotal rod 13, substantially as and for the purpose set forth.

6. In a molding-machine, the frame 2,11aving slotted sides, in combination with the crosshead 8, the levers 12, connected to the crosshead and rigidly secured to the rod 13, the stops 24 and 25, and the bell-crank levers 26,

JACOB KIN ZER.

\Vitnesses:

DARWIN S. TOLCOTT, R. H. HITTLEsEY. 

